Taiju Oki stands as a towering figure with a muscular build, spiky brown hair, and vertical stone markings beneath his eyes—later recreated with paint following his second revival. His attire, a sleeveless cloak secured by a rope and rugged boots, mirrors the Stone World’s primal environment. Orphaned early, he forged an unbreakable bond with childhood companions Senku Ishigami and Yuzuriha Ogawa. Their youth brimmed with joint endeavors: launching stuffed toys into near orbit via handmade rockets and crafting a swimming suit for Senku’s adoptive father, Byakuya. Taiju’s pacifism defined him from adolescence, as he resolved conflicts through dialogue rather than force, even when threatened. When petrification engulfed humanity, Taiju threw himself over Yuzuriha to block the paralyzing light. His unwavering resolve to confess his love kept him conscious through millennia. Revived in 5738, he rejoined Senku, lending brute strength to synthesize nital, the depetrification agent. His insight to ferment grapes accelerated alcohol production for the revival formula. Rejecting a deceptive love potion, he chose raw honesty to express his feelings. Confronting Tsukasa Shishio, Taiju’s endurance stunned allies—he withstood a kick lethal to ordinary men. Unyielding in non-violence, he offered his body as a shield to protect petrified lives. Though scientifically inexperienced, he adapted Senku’s lessons to practical challenges, enriching soil with crushed seashells for farming. After infiltrating Tsukasa’s empire alongside Yuzuriha, he returned to lead the Kingdom of Science’s Farming Division, retrieving submerged statues unaided by oxygen gear. Surviving a second global petrification and a seven-year hiatus, Taiju aided the lunar mission’s preparations. His decades-long devotion to Yuzuriha culminated in marriage, fulfilling his deepest aspiration. Across adaptations like the *Ryusui* special, his character epitomized loyalty, tenacity, and ethical rigor, consistently elevating communal needs above self-interest.